Coded data generation or conversion – Analog to or from digital conversion – Digital to analog conversion
Reexamination Certificate
2011-05-31
2011-05-31
Williams, Howard (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Digital to analog conversion
C341S053000
Reexamination Certificate
active
07952508
ABSTRACT:
Class-D amplifiers have evolved from using binary pulse-width modulation (PWM) modulators to three-level PWM modulators. Three-level PWM drivers for audio applications offer the benefits of eliminating costly elements at the output of an audio system. However, they also introduce increased common-mode interference. Three-level PWM generates three states, but one state has two interchangeable representations which can be scrambled in order to shape the common-mode output spectrum.
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Crespi Lorenzo
Lee Kyehyung
Patel Ketan B
Conexant Systems Inc.
Jackson Walker L.L.P.
Rourk Christopher J.
Williams Howard
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